Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2992616AbXBQRCf (ORCPT ); Sat, 17 Feb 2007 12:02:35 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S2992484AbXBQRCf (ORCPT ); Sat, 17 Feb 2007 12:02:35 -0500 Received: from smtp.nokia.com ([131.228.20.170]:53094 "EHLO mgw-ext11.nokia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2992617AbXBQRBg (ORCPT ); Sat, 17 Feb 2007 12:01:36 -0500 From: Artem Bityutskiy To: Linux Kernel Mailing List Cc: Christoph Hellwig , Artem Bityutskiy , Frank Haverkamp , Josh Boyer , Thomas Gleixner , David Woodhouse Date: Sat, 17 Feb 2007 18:54:59 +0200 Message-Id: <20070217165459.5845.18967.sendpatchset@localhost.localdomain> In-Reply-To: <20070217165424.5845.4390.sendpatchset@localhost.localdomain> References: <20070217165424.5845.4390.sendpatchset@localhost.localdomain> Subject: [PATCH 07/44 take 2] [UBI] misc unit header X-OriginalArrivalTime: 17 Feb 2007 16:54:59.0376 (UTC) FILETIME=[5BF59300:01C752B4] X-Nokia-AV: Clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5104 Lines: 155 diff -auNrp tmp-from/drivers/mtd/ubi/misc.h tmp-to/drivers/mtd/ubi/misc.h --- tmp-from/drivers/mtd/ubi/misc.h 1970-01-01 02:00:00.000000000 +0200 +++ tmp-to/drivers/mtd/ubi/misc.h 2007-02-17 18:07:26.000000000 +0200 @@ -0,0 +1,146 @@ +/* + * Copyright (c) International Business Machines Corp., 2006 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See + * the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * Author: Artem B. Bityutskiy + */ + +/* + * Here we keep miscellaneous functions which are used all over the UBI code and + * do not really belong to any particular unit. + */ + +#ifndef __UBI_MISC_H__ +#define __UBI_MISC_H__ + +#include + +struct ubi_info; + +#define xquotise(s) #s +#define quotise(s) xquotise(s) + +/** + * rb_for_each_entry - walk an RB-tree. + * + * @rb: a pointer to type 'struct rb_node' to to use as a loop counter + * @pos: a pointer to RB-tree entry type to use as a loop counter + * @root: RB-tree's root + * @member: the name of the 'struct rb_node' within the RB-tree entry + */ +#define rb_for_each_entry(rb, pos, root, member) \ + for (rb = rb_first(root), \ + pos = (rb ? container_of(rb, typeof(*pos), member) : NULL); \ + rb; \ + rb = rb_next(rb), pos = container_of(rb, typeof(*pos), member)) + +/* + * align_up - align an integer to another integer. + * + * @x: the integer to align + * @y: the integer to align to + * + * This function returns the lowest number which is multiple to @y and not less + * then @x. + */ +static inline int align_up(int x, int y) +{ + return y*(x/y) + (!!(x % y)) * y; +} + +/* + * align_down - align an integer to another integer. + * + * @x: the integer to align + * @y: the integer to align to + * + * This function returns the highest number which is multiple to @y and not + * greater then @x. + */ +static inline int align_down(int x, int y) +{ + return y*(x/y) - (!!(x % y)) * y; +} + +/** + * ubi_buf_all_ff - check if buffer contains only 0xFF bytes. + * + * @buf: buffer to check + * @size: buffer size in bytes + * + * This function returns non-zero in there are only 0xFF bytes in @buf, and + * zero if something else was also found. + */ +int ubi_buf_all_ff(const void *buf, int size); + +/** + * ubi_buf_all_zeroes - check if buffer contains only zeroes. + * + * @buf: buffer to check + * @size: buffer size in bytes + * + * This function returns non-zero in there are only 0 bytes in @buf, and + * zero if something else was also found. + */ +int ubi_buf_all_zeroes(const void *buf, int size); + +/** + * ubi_check_pattern - check if buffer contains only a certain byte pattern. + * + * @buf: buffer to check + * @patt: the pattern to check + * @size: buffer size in bytes + * + * This function returns non-zero in there are only @patt bytes in @buf, and + * zero if something else was also found. + */ +int ubi_check_pattern(const void *buf, uint8_t patt, int size); + +/** + * strdup_len - duplicate a string with known length. + * + * @str: original string + * @len: the length of the string + */ +char *strdup_len(const char *str, int len); + +/** + * calc_data_len - calculate how much real data is stored in a buffer. + * + * @ubi: the UBI device description object + * @buf: a buffer with the contents of the physical eraseblock + * @length: the buffer length + * + * This function calculates how much real data is stored in @buf. Continuous + * 0xFF bytes at the end of the buffer are not considered as data. + */ +int ubi_calc_data_len(const struct ubi_info *ubi, const void *buf, + int length); + +/** + * ubi_check_volume - check the contents of a (static) volume. + * + * @ubi: the UBI device description object + * @vol_id: ID of the volume to check + * + * This function checks if a static volume is corrupted by fully reading it and + * checking data CRC. This function returns %0 if the volume is not corrupted, + * %1 if it is corrupted and a negative error code in case of failure. Dynamic + * volumes are not checked and zero is returned immediately. + */ +int ubi_check_volume(const struct ubi_info *ubi, int vol_id); + +#endif /* !__UBI_MISC_H__ */ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/